Cartridge utility knife



FIG. 1 is a left perspective view of a cartridge utility knife illustrating my new design;

FIG. 2 is a left side elevation view of the cartridge utility knife of FIG. 1;

FIG. 3 is a right side elevation view of the cartridge utility knife of FIG. 1;

FIG. 4 is a rear elevation view of the cartridge utility knife of FIG. 1;

FIG. 5 is a front elevation view of the cartridge utility knife of FIG. 1;

FIG. 6 is a top plan view of the cartridge utility knife of FIG. 1;

FIG. 7 is a bottom plan view of the cartridge utility knife of FIG. 1; and,

FIG. 8 is a right perspective view of the cartridge knife.

The broken lines in the drawings illustrate portions of the design that form no part of the claim. 

CLAIM The ornamental design for a cartridge utility knife, as shown and described. 